Clutch.



(Ho Modal.)

. Home a D. Hammam.

CLUTCH.

(Application led June 1, 1900,)

Patented c. 9, EQQ.

Sterns arent* sinon.

HERMAN MOON ABU UU WARD 'llICliURREN, 0F GROVE (l'li'Y, PENNSYLVANIA.

GLUTCl-l.

v SPECIFICATION forming; part of Letters Patent No. 559,349,datedOctober 9', 1900.

v Application filed June 1, 1900. Serial No. 18,769. (No model.) y

To all whom t ntf/ly Concern:

Be it known that we, HERMAN Moon and DUWARD MCMURREN, citizens of theUnited States,`residing at Grove City, in the `county of Mercer andSlate of Pennsylvania, have in-v vented anewand useful Clutch, of whichthe following is a specification.

This invention relates to clutches in general, and more particularly tothe class of friction-clutches; and it has specific reference toclutches designed for clutching a normallyidle pulley to a rotatableshaft when it is desired to cause' the pulley to rotate with the shaft.v

In the drawings forming a portion of this specification, and in which.like numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation showing the complete clutch mechanismmounted upon a shaft. Fig. 2 is a central longitudinal section of theclutch mechanism and. showing the shaft and parts of the mechanism inelevation. Fig. 3 is an end elevation of the clutch proper with thefaceplate removed to show the relative arrangements of the engagingmembers.- Fig. 4 is a longitudinal section of a modified form ofclutch-operating mechanism.

Referring now to the drawings, and more particularly to Figs. .1, 2, and3 thereof, 5 represents a power-shaft upon which is `loosely mounted anidler or loose pulley 6, said pulley being directly mounted upon asleeve 7, which is in turn fixed to the shaft 5 by means of'a keyS,as'shown, the loose pulley heiligheid from displacement longitu dinallyfrom the sleeve in one direction by means of a collar 9, which isremovably mounted upon the sleeve. At the opposite endzof the sleeve 7is 'formed a web 10, which is. .diskfshaped andfrom the outer face ofwhichprojecs an annular llange 11, the functions "of whichwill bepresently explained. At that end of the hub of the pnlley 6 adjacent. tothe web 10 and between said web and the rim of the pulley there isformed a disk-shaped web 12, which lies against the rear faceof web l0and which is provided with an annular flange 1.3 on its outer face,which flange encircles the llange 11 of disk 10 and projects slightlybeyond it.

.has four converging faces.

l The inner face of flange 13 forms one clutchaoe, the opposingclutch-faces beingupon members movably mounted in the flange 1l. Theflange 1l is provided with fourequidistant radial slots 14, and in theseslots are slidably disposed the stems 15 of segmental clutch members16,'said members 16 lying between the adjacent faces of the flanges lland 13. 'lhus if the inner ends of the siemsl be engaged to movethemontwardly the clutch faces of the movable members will be broughtinto frictional engagement with the inner face of flange l1 and thepulley will be frictionally heldtoretntewih the sleeve 7. To effect thislongitudinal movement of the stems 15,-the inner ends thereof arebeveled on their outer faces for engagement by a wedge 17, which In thedrawings this wedge l? is in the form of a sleeve,\vliieh is slidablymounted on the shaft and which has' an enlarged outer end 18, theinternal diameter of which is increased to an extent suliicient to fitslidably over a sleeve 19, which is fixed upon the shaft. The sleeveportion 18 has longitudinal slots 2O therein, and on opposite sides ofthese slots are ears 2l, in which are pivotally mounted levers 22, theinner ends of which are extended to lie in recesses in sleeve 19, sothat as the outer ends of the levers are operated the sleeve 18 will bereciprocated and the wedge will be moved toward and away from themovable clutch members to spread them and release them alternately. Whenthe clutch mcmbers are released, they are moved out oi' clutchingposition by means of bow-springs :33,which are disposed with their endsagainst the inner faces oi' the segmental sections of flange 11, thecentral portions of the springs resting against blocks 24 upon the innerends of the stems 15 of the clutch members 16.

1n order to operate the levers 22, a collar 25 is slidably mounted onsleeve 19,' and in slots 26 at one end thereof are pivoted the ends oflinks 27, the outer ends of said links being bi lu rcatod to pivotal lyreceive the outer ends of the levers. The collar 25 has the usualperipheral groove 28 to receive the yoke of a shifting lever (not shown)and is prevented from rotatable displacement upon the sleeve l!) bymeans of -a linger 29,v which -pulley 6 is clutched to rotate with theand 2, the movable members of the clutchthat is, the parts within theinclosure of flange 13-are covered by a plate 3l,which is screwed ont-othe flange 11 and fits into the inclosure of flange 13.

ln Fig. 4 of the drawings there is shown a different form of mechanismfor operating the wedge which spreads the movable members of the clutch,and this device is adapted for use upon the end of a shaft. It consistsof a cap 35, which may be of skeleton formation, and comprises a flange36, which is perforated to receive attaching-bolts 37 upon the rear edgeof the flange 13, flange 36 being held on the bolts by clamping-nuts.The cap 35 has a threaded perforation disposed to aline axially with theshaft 5, and with .thse threads is'engaged a screw-shaft 39, at theinner end of which is rotatably mounted a wedge 40, corresponding to thewedge above referred to, and which wedge is adapted to engage and movethe stems 15 of the movable clutch members. The outer end of shaft 39 isangular in cross-section and has mounted thereon a hand-wheel 42, whichis adapted A for slidable movement.

On one end of the hub of the handwheel is formed a clutch memberconsisting of a series of teeth 43, and upon the outer end of the cap 35are corresponding teeth 44, the hand-wheel beingheld normally andyieldahly'in position to engage the teeth by means of a helical spring45, which encrcles the outer end of the screwshaft and bears at its endsagainst the outer face of the hand-wheel and against the stop 46 at theend o'f the shaft. Thus the handwheel will be normally held with itsteeth against the teeth of the cap to prevent adjustment of the wedge,and by drawing the handwheel rearwardly the teeth will be disengaged andthe hand-wheel may be rotated to adjust the wedge.

In practice various modifications ofithe lnvention may be made and anysuitable materials and proportions may be used for-the varions partswithout departing from-the spiritof the invention.

lVhat is claimed is- 1. In a clutch mechanism, the combination with asleeve hevinga flanged web, said flange having slots therethrough of apulley disposed loosely on the sleeve and provided with a flange whichencircles the flange of the web, clutch members having stems slidablyengaged with the slots and having segmental heads lying between theflanges, the innerends of the stems being beveled, arc-shapedstop-blocks npon the stems, bow-springs dis posed with their endsagainst the web-flange and each with its bow against the ends ofmuwally-adjacent stopbl0cks to hold the mem- -bers normally retractedwith the ends of the blocks in contact to'hold the beveled ends of thestems spaced, and means for engagement with the beveled portions of themembers to` move them radially.

2. In aclutch mechanism, the combination with coperating clutch-facesand their carrying members, of a reciprocatory sleeve adapted forengagement with one member to operateA it, said sleeve having slotstherein, a second sleeve projecting into the first sleeve andadapted forattachment fixedly with a shaft the second sleeve having recessestherein, levers pivoted to the first sleeve and engaging the recesses ofthe second sleeve, a collar on the second sleeve and having link con.-nections with the levers, a finger upon the col'- lar slidably engagedwith the second sleeve ho' prevent rotation with means for reciprocatingthe collar. V

In testimony that we claim the foregoing as our own we have hereto aixedin the presence of two witnesses.

HERMAN MOON. i DUWARD MCMURREN.

llVitnesses:

"'C. F. LAWRENCE,

Jas. L. LAWRENCE.

respect thereto, and i our signatures'

